Accessing multiple data from Python dictionary

I have a Python dictionary that looks like this:

data = {
"shape" : "rectangle",
"dimensions" : [ {
  "length" : 15,
  "breadth": 20
}, {
  "length" : 20,
  "breadth": 10
} ]
}

In my use case, there would be over one hundred of these rectangles with their dimensions.

I wrote a code to find the area:

length = data['dimensions'][0]['length']
breadth = data['dimensions'][0]['breadth']
area = length * breadth 
print(area)

Running the code above will give me the result of 300 because it multiplies the first two length and breadth data from the dictionary (15 * 20).

How do I also get the multiplied value of the other "length" and "breadth" data and add them together with a loop of some sort? because again, in my use case there would be hundreds of these "length" and "breadth" data.

>Solution :

You can use a list comprehension:

[item["length"] * item["breadth"] for item in data["dimensions"]]

This outputs:

[300, 200]

To sum them, you can use sum():

sum(item["length"] * item["breadth"] for item in data["dimensions"])

This outputs:

500